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#Post#: 11595--------------------------------------------------
Re: 222 v 223
By: BenBlaker Date: July 15, 2013, 2:19 am
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That should have read 222 magnum. ::)
The 222 sits about the same place as the 223 (not a lot in it if
both are handloaded) but the 222 magnum is a very hot cartridge.
Unfortunately it seems to have died a quiet death (the 222
magnum that is), and not many people made rifles for it (about
four makes if I remember correctly)
Also getting ammo for it nowadays is extremely difficult, and
hand loading is the way to go if you buy one.
I think maybe one maker still chambers 222 magnum now, but
standard 222 is still common and lots make rifles and ammo in
that chamber.
Ref 204 over 223 ballistic coefficient. YES if they are both
firing the same size bullet, but the 223 isn't at its most
efficient when firing a 40 grain bullet, and hence you would
choose a more optimum bullet for the 223. In which case the 204
having the lighter bullet will be more affected by wind (once
downwind) its a bit like trying to compare the 17hmr with the
22wmr really
#Post#: 11597--------------------------------------------------
Re: 222 v 223
By: Al Dunn Date: July 15, 2013, 2:50 am
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Quote:
In which case the 204 having the lighter bullet will be more
affected by wind (once downwind) its a bit like trying to
compare the 17hmr with the 22wmr really
No it's not.
Ok, we'll take two typical loads. A 39gn Sierra Blitzking
travelling at 3600 fps at 300 yards from a .204 will have 4.1"
of wind drift in a 10mph wind.
A typical .223 Rem load - 55gn Vmax travelling at 3100fps at the
same distance will have 5.2" of wind drift. It's all down to
ballistic coefficients. Calibre has little bearing on it. To
generalise and say that .204 is 'more sensitive' to wind is just
plain wrong.
Al.
#Post#: 11881--------------------------------------------------
Re: 222 v 223
By: Secret assassin Date: July 23, 2013, 8:59 am
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Good reading boys, it looks like Ben'z met his match PMSL ;D
#Post#: 11885--------------------------------------------------
Re: 222 v 223
By: duck caller Date: July 23, 2013, 11:45 am
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well that went right over my head lads
but good reading if i owned any of these rifles both of yous
would be the first people i would ask a question thats a lot of
knowledge there must of took years of shooting practice to
learn that
#Post#: 11887--------------------------------------------------
Re: 222 v 223
By: foxyloxy Date: July 23, 2013, 1:04 pm
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[quote author=duck caller link=topic=735.msg11885#msg11885
date=1374597950]
well that went right over my head lads
but good reading if i owned any of these rifles both of yous
would be the first people i would ask a question thats a lot of
knowledge there must of took years of shooting practice to
learn that
[/quote]
Yea spose so. Or then again you could just punch the reqd info
into a ballistics app like Strelok lol ;D
#Post#: 11888--------------------------------------------------
Re: 222 v 223
By: duck caller Date: July 23, 2013, 1:20 pm
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foxy thats a great site anymore of them
#Post#: 11908--------------------------------------------------
Re: 222 v 223
By: foxyloxy Date: July 24, 2013, 1:19 am
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There prob is DC but that's the only one I use.
Its fairly accurate providing u put the proper info into the
calculator.
Bullet ballistic coefficient
Bullet speed
Bullet weight
Zero distance
Height of cross hair above bore of the barrell
Height above sea level
Air pressure
Wind speed
Wind direction
Vertical angle of the shot (I think)
All those type of things ;)
Then you choose your reticle from the extensive collection and
bobs sure aunties husband ;D
#Post#: 11910--------------------------------------------------
Re: 222 v 223
By: duck caller Date: July 24, 2013, 3:17 am
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thats great i now have a 3rd person to ask questions lol
#Post#: 11958--------------------------------------------------
Re: 222 v 223
By: Al Dunn Date: July 25, 2013, 2:52 am
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[quote author=foxyloxy link=topic=735.msg11887#msg11887
date=1374602695]
[quote author=duck caller link=topic=735.msg11885#msg11885
date=1374597950]
well that went right over my head lads
but good reading if i owned any of these rifles both of yous
would be the first people i would ask a question thats a lot of
knowledge there must of took years of shooting practice to
learn that
[/quote]
Yea spose so. Or then again you could just punch the reqd info
into a ballistics app like Strelok lol ;D
[/quote]
Putting the details into a ballistic calculator is only a very
small part of the study of internal and external ballistics.
You also need to know about bullet stabilisation, recoil
harmonics, barrel time, pressures etc.
The old saying about a little knowledge being a dangerous thing
was never more true than when talking about ballistics. In fact,
a little knowledge can be deadly....
If you're really interested in learning about ballistics, I can
thoroughly recommend Bryan Litz's excellent book Applied
Ballistics for Long Range Shooting. It contains most of what you
need to understand this subject.
As I alluded to above - be VERY careful of 'armchair experts' on
this subject. Their advice can be very dangerous.
Some of the stuff I have seen on here in the short time I've
been here makes me shudder.
Al.
#Post#: 11969--------------------------------------------------
Re: 222 v 223
By: foxyloxy Date: July 25, 2013, 8:36 am
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Shudder ye not Al ;D
I for one am no long range expert. Busting clays at 500 yards
has been the height of my endeavours.
As for working out bullet drops, I just do it is the old
fashioned way.
I set up a good tall target with a safe backstop, zero the rifle
at the chosen distance & work back in increments from your
target. In my case (10 yards for the air rifle, 25 yards for the
hmr & 50 yards for the 223). Keep aiming at the same point at
the top of the target & then simply measure the drop from the
POA to the POI. Then work out how many clicks that corresponds
with.
Simples.
FL
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